US7739917B2ExpiredUtilityA1
Pipe formability evaluation for expandable tubulars
Est. expirySep 20, 2022(expired)· nominal 20-yr term from priority
E21B 43/103G01N 3/08G01N 2203/0017G01N 2203/0682G01N 2203/0274Y10T29/4994G01N 3/28
47
PatentIndex Score
7
Cited by
1,996
References
45
Claims
Abstract
A method of testing a tubular member and selecting tubular members for suitability for expansion by subjecting a representative sample the tubular member to axial loading, stretching at least a portion of the tubular member through elastic deformation, plastic yield and to ultimate yield, and based upon changes in length and area calculating an expandability coefficient indicative of expandability of the tubular members and selecting tubular members with relatively high coefficients indicative of good expandability.
Claims
exact text as granted — not AI-modified1. A method for selecting a solid steel tubular member for suitability for downhole radial expansion and plastic deformation to form a steel wellbore casing on a basis comprising use of an expandability coefficient determined pursuant to a change in diameter of the solid steel tubular member resulting from a stress-strain test performed on the solid steel tubular member, while in a tubular shape, using tensile axial loading.
2. The method of claim 1 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including the percentage by weight of carbon being no less that 0.02% and less than 0.030%.
3. The method of claim 1 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including stress-strain properties in one or more directional orientations.
4. The method of claim 1 wherein selecting the solid steel tubular member is further based on the strength and elongation of the solid steel tubular member.
5. The method of claim 1 wherein selecting the solid steel tubular member is further based on the stress burst rupture of the solid steel tubular member.
6. The method of claim 1 wherein selecting the solid steel tubular member is further based on the strain-hardening exponent and hardness of the solid steel tubular member.
7. The method of claim 1 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including a Charpy V-notch impact value in one or more directional orientations.
8. The method of claim 1 wherein selecting the solid steel tubular member is further based on the stress collapse rupture of the solid steel tubular member.
9. The method of claim 1 wherein selecting the solid steel tubular member is further based on the yield strength of the solid steel tubular member.
10. The method of claim 1 wherein selecting the solid steel tubular member is further based on the ductility of the solid steel tubular member.
11. The method of claim 1 wherein selecting the solid steel tubular member is further based on the toughness of the solid steel tubular member.
12. The method of claim 1 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including a Charpy energy of at least 90 ft-lbs.
13. The method of claim 1 wherein selecting the solid steel tubular member is further based on each of the following ranges of weight percentages of the solid steel tubular member:
Si being from 0.009% to 0.30%;
Mn being from 0.10% to 1.92%;
P being from 0.004% to 0.07%;
S being from 0.0008% to 0.006%;
Al being up to 0.04%;
N being up to 0.01%;
Cu being up to 0.3%;
Cr being up to 0.5%;
Ni being up to 18%;
Nb being up to 0.12%;
Ti being up to 0.6%;
Co being up to 9%; and
Mo being up to 5%.
14. The method of claim 1 wherein the expandability coefficient includes a plastic strain ratio of the steel tubular member.
15. The method of claim 14 wherein the plastic strain ratio includes measurements in multiple anisotropic directions.
16. The method of claim 14 wherein the plastic strain ratio includes a ratio of the strains occurring in the width and length directions of the steel tubular member.
17. The method of claim 1 wherein the expandability coefficient includes a plastic anisotropy of the steel tubular member.
18. The method of claim 1 wherein the expandability coefficient includes a formability anisotropy coefficient F(r).
19. A method comprising:
providing a solid steel tubular member;
performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape, causing a change in diameter of the solid steel tubular member;
determining an expandability coefficient of the solid steel tubular member based on the change in diameter from the stress-strain test;
selecting another solid steel tubular member using the expandability coefficient;
disposing the selected solid steel tubular member in an earthen wellbore; and
radially expanding and plastically deforming the selected solid steel tubular member to form a steel wellbore casing.
20. The method of claim 19 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including the percentage by weight of carbon being no less that 0.02% and less than 0.030%.
21. The method of claim 19 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including stress-strain properties in one or more directional orientations.
22. The method of claim 19 wherein selecting the solid steel tubular member is further based on the strength and elongation of the solid steel tubular member.
23. The method of claim 19 wherein selecting the solid steel tubular member is further based on the stress burst rupture of the solid steel tubular member.
24. The method of claim 19 wherein selecting the solid steel tubular member is further based on the strain-hardening exponent and hardness of the solid steel tubular member.
25. The method of claim 19 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including a Charpy V-notch impact value in multiple directional orientations.
26. The method of claim 19 wherein selecting the solid steel tubular member is further based on each of the following ranges of weight percentages of the solid steel tubular member:
Si being from 0.009% to 0.30%;
Mn being from 0.10% to 1.92%;
P being from 0.004% to 0.07%;
S being from 0.0008% to 0.006%;
Al being up to 0.04%;
N being up to 0.01%;
Cu being up to 0.3%;
Cr being up to 0.5%;
Ni being up to 18%;
Nb being up to 0.12%;
Ti being up to 0.6%;
Co being up to 9%; and
Mo being up to 5%.
27. The method of claim 19 wherein the expandability coefficient includes a plastic strain ratio of the steel tubular member.
28. The method of claim 19 wherein the expandability coefficient includes a plastic anisotropy of the steel tubular member.
29. The method of claim 19 wherein the expandability coefficient includes a formability anisotropy coefficient F(r).
30. A method comprising:
providing a solid steel tubular member;
performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
collecting data as a result of the stress-strain test, the data including an outer diameter of the steel tubular member and an inner diameter of the steel tubular member;
determining an expandability coefficient of the solid steel tubular member using the data;
selecting another solid steel tubular member using the expandability coefficient;
disposing the selected solid steel tubular member in an earthen wellbore;
displacing an expansion device through the selected solid steel tubular member while in the wellbore to radially expand and plastically deform the selected solid steel tubular member.
31. The method of claim 30 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including the percentage by weight of carbon being no less that 0.02% and less than 0.030%.
32. The method of claim 30 wherein selecting the solid steel tubular member is (Previously presented) further based on the solid steel tubular member including stress-strain properties in one or more directional orientations.
33. The method of claim 30 wherein selecting the solid steel tubular member is further based on the strength and elongation of the solid steel tubular member.
34. The method of claim 30 wherein selecting the solid steel tubular member is further based on the stress burst rupture of the solid steel tubular member.
35. The method of claim 30 wherein selecting the solid steel tubular member is further based on the strain-hardening exponent and hardness of the solid steel tubular member.
36. The method of claim 30 wherein selecting the solid steel tubular member is further based on the solid steel tubular member including a Charpy V-notch impact value in multiple directional orientations.
37. The method of claim 30 wherein selecting the solid steel tubular member is further based on each of the following ranges of weight percentages of the solid steel tubular member:
Si being from 0.009% to 0.30%;
Mn being from 0.10% to 1.92%;
P being from 0.004% to 0.07%;
S being from 0.0008% to 0.006%;
Al being up to 0.04%;
N being up to 0.01%;
Cu being up to 0.3%;
Cr being up to 0.5%;
Ni being up to 18%;
Nb being up to 0.12%;
Ti being up to 0.6%;
Co being up to 9%; and
Mo being up to 5%.
38. The method of claim 30 wherein the expandability coefficient includes a plastic strain ratio of the steel tubular member.
39. The method of claim 30 wherein the expandability coefficient includes a plastic anisotropy of the steel tubular member.
40. The method of claim 30 wherein the expandability coefficient includes a formability anisotropy coefficient F(r).
41. The method of claim 30 wherein the data includes the strains occurring in the width and length directions of the steel tubular member, and the determining an expandability coefficient includes a ratio of the strains.
42. A method for selecting a solid steel tubular member for suitability for downhole radial expansion and plastic deformation to form a steel wellbore casing on a basis comprising use of an expandability coefficient determined pursuant to a stress-strain test performed on the solid steel tubular member, while in a tubular shape, using tensile axial loading, wherein the expandability coefficient is calculated using the formula:
f
=
ln
b
o
b
k
ln
L
k
b
k
I
o
b
o
Equation
1
where,
f—expandability coefficient;
b o & b k —initial and final tube cross sectional area (inch^2);
L o & L k —initial and final tube length (inch);
b=(D^2−d^2)/4—cross section tube area;
D=tube outside diameter; and
d=tube inside diameter.
43. A method comprising:
providing a solid steel tubular member;
performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
determining an expandability coefficient of the solid steel tubular member based on the stress-strain test;
selecting another solid steel tubular member using the expandability coefficient;
disposing the selected solid steel tubular member in an earthen wellbore; and
radially expanding and plastically deforming the selected solid steel tubular member to form a steel wellbore casing;
wherein the expandability coefficient is calculated using the formula:
f
=
ln
b
o
b
k
ln
L
k
b
k
I
o
b
o
Equation
1
where,
f—expandability coefficient;
b o & b k —initial and final tube cross sectional area (inch^2);
L o & L k —initial and final tube length (inch);
b=(D^2−d^2)/4—cross section tube area;
D=tube outside diameter; and
d=tube inside diameter.
44. A method comprising:
providing a solid steel tubular member;
performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
collecting data as a result of the stress-strain test;
determining an expandability coefficient of the solid steel tubular member using the data;
selecting another solid steel tubular member using the expandability coefficient;
disposing the selected solid steel tubular member in an earthen wellbore;
displacing an expansion device through the selected solid steel tubular member while in the wellbore to radially expand and plastically deform the selected solid steel tubular member;
wherein the expandability coefficient is calculated using the formula:
f
=
ln
b
o
b
k
ln
L
k
b
k
I
o
b
o
Equation
1
where,
f—expandability coefficient;
b o & b k —initial and final tube cross sectional area (inch^2);
L o & L k —initial and final tube length (inch);
b=(D^2−d^2)/4—cross section tube area;
D=tube outside diameter; and
d=tube inside diameter.
45. A method comprising:
providing a solid steel tubular member;
performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
collecting data as a result of the stress-strain test;
determining an expandability coefficient of the solid steel tubular member using the data;
selecting another solid steel tubular member using the expandability coefficient;
disposing the selected solid steel tubular member in an earthen wellbore;
displacing an expansion device through the selected solid steel tubular member while in the wellbore to radially expand and plastically deform the selected solid steel tubular member;
wherein the data includes a force measurement, an outer diameter of the steel tubular member, an inner diameter of the steel tubular member, or a combination thereof, and the determining an expandability coefficient includes calculating an anisotropy of the steel tubular member using a ratio of the data.Cited by (0)
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